<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>当前系统时间</title>
<link rel="stylesheet" href="style.css"  />
<script language="javascript" type="text/javascript">

  window.onload = function(){
    showTime();
  }
  function checkTime(i){  //补位处理
     if(i<10)
     i='0'+i;
     return i; 

  }
  function showTime(){
    var now=new Date();
    var year=now.getFullYear();
    var month=now.getMonth()+1;
    var day=now.getDate();
    var h=now.getHours();
    var m=now.getMinutes();
    var s=now.getSeconds();
    var d=now.getDay();
    m=checkTime(m);
    s=checkTime(s);

    var weekday=new Array(7)
    weekday[0]="星期日"
    weekday[1]="星期一"
    weekday[2]="星期二"
    weekday[3]="星期三"
    weekday[4]="星期四"
    weekday[5]="星期五"
    weekday[6]="星期六"

    document.getElementById("show").innerHTML=""+year+"年"+month+"月"+day+"日 "+weekday[d] +h+":"+m+":"+s;
      setTimeout('showTime()',500);
  }

</script>
</head>
<body>
<div class="content1">
  <div id="show">显示时间的位置</div>
</div>
</body>
</html>